Authentication email has already been sent, please check your email box: and activate it as soon as possible.
You can login to My Profile and manage your email alerts.
If you haven’t received the email, please:
|
|
There are 17 papers published in subject: > since this site started. |
Results per page: | 17 Total, 2 Pages | << First < Previous 1 2 |
Select Subject |
Select/Unselect all | For Selected Papers |
Saved Papers
Please enter a name for this paper to be shown in your personalized Saved Papers list
|
1. The Exact Solutions to the Gravitational Contraction in Comoving Coordinate System | |||
Ying-Qiu Gu | |||
Physics 01 April 2009 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:The gravitational collapse of a star is a warmly discussed but still puzzling problem, which not only involves the dynamics of the gases, but also the subtle coordinate transformation. In this letter, we give some more detailed investigation on this problem, and reach the results: (I). The comoving coordinate system for the stellar system is only compatible with the zero-pressure free falling particles. (II). For the free falling dust, there are three kind of solutions respectively corresponding to the oscillating, the critical and the open trajectories. The solution of Oppenheimer and Snyder is the critical case. (III). All solutions are exactly derived. There is a new kind singularity in the solution, but its origin is unclear. | |||
TO cite this article:Ying-Qiu Gu. The Exact Solutions to the Gravitational Contraction in Comoving Coordinate System[OL].[ 1 April 2009] http://en.paper.edu.cn/en_releasepaper/content/30983 |
2. Inhomogeneous Vacuum: An Alternative Interpretation of the Curved Space-time | |||
Xing-Hao Ye,Qiang Lin | |||
Physics 28 February 2008 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:The strong similarities between the light propagation in a curved space-time and that in a medium with graded refractive index are found. It is pointed out that a curved space-time is equivalent to an inhomogeneous vacuum for light propagation. The corresponding graded refractive index of the vacuum in a static spherically symmetrical gravitational field is derived. This result provides a simple and convenient way to analyze the gravitational lensing in astrophysics. | |||
TO cite this article:Xing-Hao Ye,Qiang Lin. Inhomogeneous Vacuum: An Alternative Interpretation of the Curved Space-time[J]. |
3. Derivation of New Conversion Factor & New Compton Formula | |||
Zhang Changtai,Zhang Yuan | |||
Physics 14 January 2008 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:by using classical instead of modern physics approach, we derived the new mass-energy conversion factor and its application fields. We are the first to point out that the mass-energy formula & nuclear reaction should be classified to the classical physics; we also pay attention to the comparison on the differences between this new factor and Lorentz factor . Based on this new factor, we worked out the possibility and conditions of the existence of material with super velocity of light; we also worked out a new Compton formula and a special effect of light scattering--- Scattering Convergence Effect, which should be regarded as a criterion on whether or not the mass will be increased when the particle is in motion, i.e., as a touchstone on whether or not the Relativity is right. | |||
TO cite this article:Zhang Changtai,Zhang Yuan. Derivation of New Conversion Factor & New Compton Formula[OL].[14 January 2008] http://en.paper.edu.cn/en_releasepaper/content/18055 |
4. On detection of very-high-frequency relic gravitational waves using polarization of electromagnetic waves | |||
Ming-Lei Tong,Yang Zhang | |||
Physics 28 December 2007 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:The polarization vector of electromagnetic waves will experience rotations in a region of spacetime perturbed by gravitational waves. Based on this idea, Cruise\\\\\\\ | |||
TO cite this article:Ming-Lei Tong,Yang Zhang. On detection of very-high-frequency relic gravitational waves using polarization of electromagnetic waves[OL].[28 December 2007] http://en.paper.edu.cn/en_releasepaper/content/17493 |
5. Decay of massive Dirac fields in Kerr spacetime | |||
He Xi ,Jing Jiliang | |||
Physics 02 June 2006 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:The late-time tail of massive Dirac fields in Kerr spacetime is investigated by using the black hole Green\ | |||
TO cite this article:He Xi ,Jing Jiliang . Decay of massive Dirac fields in Kerr spacetime[OL].[ 2 June 2006] http://en.paper.edu.cn/en_releasepaper/content/6907 |
6. Quasinormal modes of the Schwarzschild black hole with arbitrary spin fields | |||
Qiyuan Pan,Jiliang Jing | |||
Physics 27 February 2006 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:The quasinormal modes (QNMs) associated with the decay of massless arbitrary spin fields around a Schwarzschild black hole are investigated by using the continued fraction method in a united form and their universal properties are found. It is shown that these QNMs become evenly spaced for large angular quantum number $l$ (for the boson perturbations) and $j$ (for the fermion perturbations) and the spacing is independent of the spin number $s$ and overtone number $n$, and in the complex plane they have an interesting trend which depends on $n$ before they become the same value with the increasing $l$ (or $j$). It is also shown that the angular quantum number has the surprising effect of increasing real part of the QNMs, but it almost does not affect imaginary part, especially for the lowest lying mode. In addition, the spacing for imaginary part of the QNMs at high overtones is equidistant and equals to $-i/4M$, which is independent of $l$ (or $j$) and $s$. | |||
TO cite this article:Qiyuan Pan,Jiliang Jing. Quasinormal modes of the Schwarzschild black hole with arbitrary spin fields [OL].[27 February 2006] http://en.paper.edu.cn/en_releasepaper/content/5393 |
7. Lorentz, Edwards transformations and the principle of permutation invariance | |||
Shen Jianqi | |||
Physics 29 August 2005 | |||
Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
Abstract:The Lorentz transformation is derived without the postulate of the universal limiting speed, and the general Edwards transformation is obtained by using the principle of permutation invariance (covariance). It is shown that the existences of the one-way universal limiting speed (in the Lorentz transformation) and the constancy of the two-way average speed of light (in the Edwards transformation) are the necessary consequences of the principle of permutation invariance that is consistent with the postulate of relativity. The connection between the Edward transformation and the general coordinate transformation is discussed, and based on this, we find that the physical meaning of the Edward parameter, which indicates the anisotropy of the speed of light, is a gravitomagnetic potential of the spacetime. | |||
TO cite this article:Shen Jianqi. Lorentz, Edwards transformations and the principle of permutation invariance[OL].[29 August 2005] http://en.paper.edu.cn/en_releasepaper/content/2739 |
Select/Unselect all | For Selected Papers |
Saved Papers
Please enter a name for this paper to be shown in your personalized Saved Papers list
|
Results per page: | 17 Total, 2 Pages | << First < Previous 1 2 |
About Sciencepaper Online | Privacy Policy | Terms & Conditions | Contact Us
© 2003-2012 Sciencepaper Online. unless otherwise stated